while calling owners API from the code do we have to give any etc permission, if we are using Private access token.
Hey, @SMehta7 
Thanks for your question. To confirm, you are asking about the needed scopes to use the CRM API | Owners endpoints, correct?
Either of:
- GET
/crm/v3/owners/ - GET
/crm/v3/owners/{ownerId}
If so, both require the scope of crm.objects.owners.read. You can also find this info here — Working with OAuth | Owners Endpoints. This applies to Privates Apps scopes as well.
Have fun building! — Jaycee